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1. The workflow demonstrated in this video uses ready-to-use LIDAR point cloud data, in that the  data has already undergone all of the LIDAR pre-processing steps up to point cloud classification. If  you have raw LIDAR or pre-classified LIDAR point clouds, I suggest you do the pre-processing and  point cloud classification first; there are many software programs that can do that. I also made one  video about it; just check my Agisoft Metashape Playlist. 2. I am using ready-to-use LIDAR data from the USGS LIDAR 3DEP Portal at this URL:  https://apps.nationalmap.gov/lidar-explorer/#/; the data is available for free and no registration is  needed. Highly recommended data source for learning purposes. 3. I am using ArcGIS Pro with an Advanced License and the 3D Analyst Extension for ArcGIS Pro; if  you don't have these prerequisites, I am afraid you wouldn't be able to practice the workflow I  demonstrated in this video.

How to calculate fraction or percentage of Vegetation or Forest Canopy Cover using LIDAR-based or Photogrammetric-based Point Clouds Data using ArcGIS Desktop. But don't worry, the methods I described in the video is easily reproduced using other GIS Software such as QGIS or SAGA, as long as those software support LIDAR Point Clouds reading and they have capabilities to perform raster based spatial analysis/raster calculator.

How to combine LIDAR and Photogrammetry Point Clouds for 3D GIS and orthorectification

How to extract building footprints polygon from point clouds data generated from LIDAR or Photogrammetric UAV Survey. If you have LIDAR points clouds, the perfect and precise result is guaranteed. If you are using Point clouds data generated from photogrammetric processing of aerial or UAV Survey, make sure you perform precise point clouds classification first, or else some misclassified and wrongly extracted building footprints are expected.